490-y×7=350

To solve the equation, we need to isolate the variable, which in this case is "y".

Step 1: Subtract 350 from both sides of the equation to move the constant term to the right side:

490 - y × 7 - 350 = 0

Simplifying,

140 - 7y = 0

Step 2: Subtract 140 from both sides of the equation to move the constant term to the left side:

-7y = -140

Step 3: Divide both sides of the equation by -7 to solve for y:

-7y / -7 = -140 / -7

Simplifying,

y = 20

So the solution to the equation is y = 20.